so that引导的结果状语从句,自能位于主句之后.
有时可省掉so而只用that,这时不能有逗号.
有时可省掉that而只用so,这时是并列句,用逗号.
we went early,so that we fulfilled our task in time.
it was very cold,so that the river froze.
our group did very well that we were praised by the workers.
aluminum is light and strong,so it is widely used in aircraft industry.
注意区别：
so that后边的从句,有may,might的是目的状语从句,没有的是结果状语从句.
i got up early that i might be in time for the express.
i got up early that i was in time for the express.